If I’m correct Sforno in his commentary on Bereshit 3:1 teaches in short that the snake represents ‘the power of imagination’ (imaginative faculty).
The Or HaChayim teaches that Adam and Chava were able to understand ‘the language’ that the animals ‘spoke’.
Abarbanel explains this, stating that the serpent did not speak literally, but through its actions and appearance (see also Job 12: 7-8, 28:14, 28:22, Psalm 148: 7 for similar examples) and the thought that man had about this.
Hence, by the acts of the serpent, it was supposed that the fruits of the tree of knowledge would be delightfully good. Bereshit 3:10, according to Abarbanel, would mean, "Adam's imagination was more tricky than the imagination of any other beast of the field. Because the human imagination is capable of forming syllogisms and arguments that appear to be true - something that animals are incapable of ". The snake is seen by the Chazal as the symbol of the imagination and the Zohar explains that the snake’s voice was not the voice of a living being, but 'an inner voice' (internal dialogue) which convinced Chava (defended and convincingly) to eat from the tree.
If there was a real snake (external force) which through the power of our imagination formed an image (inner voice) which Chava and Adam thought of to be the truth, which caused them to sin. Then it was only an trigger which started this thought process.
In such a case what should we make of the words spoken by HaShem in Bereshit 3:14-15?
[And for those who would like to share other options/thoughts - if the snake (could be an animal, satan, yetzer hara or one of the malachim) did indeed literally spoke to Chava then why was it cursed? Wasn’t the snake just fulfilling (its mission/task/purpose) what it was made for.